Error and biblio nodes not accessible when working with Workflow

I had added Workflow to a site using biblio. I noticed when editing an existing biblio node, it was decremented to a draft, so I promoted it to review and approved it, however the node was then no longer accessible to anonymous users. I created a new node which I promoted from creation through draft, review and to approved, and it was also not being accessible to anonymous users. They are visibly set to published. The approval triggers an action to publish and save. Approval generated the following error:
"warning: Invalid argument supplied for foreach() in /home/etcenter/public_html/sites/all/modules/biblio/biblio.contributors.inc on line 181."

Leaving the Workflow module on, I changed the Biblio's Workflow setting to none. Then I was able to create a new node to replace the old node, and it is now accessible. I could not make the original accessible, trying to un-publish and publish again.

I check permissions and see nothing that might relate to this. Anonymous users have access to biblio content.

I know,... I am still using 1.15. It was working, and I had originally, against good advice, modified biblio_style_chicago and classic and so I resisted updating. If needed I will update. I tried clearing the cache as was suggested in related issues. It didn't help.

Is there a conflict? Are other people using Biblio with Workflow without trouble? Is there a setting I am missing?

Thanks
Matt